We have a couple of carports installed for a rescue vehicle (ambulance) and a fire engine. I need to install (2) cord reels for these vehicles for a ship to shore power condition.. The ambulance has a GFCI in the power compartment. In the past there has been a GFCI installed on the circuit for the ambulance and we had nuisance tripping. So is there a way way to avoid installing the GFCI on these circuits by installing a twist lock body connector on the end of the cord reel?